Great job if this car really exist. Why no build-up photos? This is so complicated job that absolutely more pictures needed from the process. You can take engine photos and interior pics from dashboard using normal E90 M3. And have exterior fitted with M-panels just for visual refit, without engine, suspension or other technology swap. Ok, there are some seat pics also with M-seats inside E91...

If this car really exists, congratulations, perhaps the car of the 2011 in BMW community. Sorry if I'm rude while setting some questions, this just seems to be so complex task to be true that I can't believe it without comprehensive explanation...

You should take it by your local BMW dealer and watch the look of confusion on their faces lol. Post some videos if you can!

Don't act like that's hard to do. I took my E90 x-Drive to a dealer for service and they wrote on the key-tag "Silver M3" because its on KW V3 and has a quad tipped exhaust The real fun came when they went looking for my car and couldn't find it. Normally I would have been in a panic that they couldn't find the car, but I could see it from the service counter, they were just looking for an actual M car.